A comparative study on the electrochemical capacitor performance of 1T/2H hybridized phase and 2H pure phase of MoS2nanoflowers

Ramesh Aravind Murugesan; Krishna Chandar Nagamuthu Raja

doi:10.1088/1361-6528/ac2e24

A comparative study on the electrochemical capacitor performance of 1T/2H hybridized phase and 2H pure phase of MoS₂nanoflowers

Nanotechnology. 2021 Oct 27;33(3). doi: 10.1088/1361-6528/ac2e24.

Authors

Ramesh Aravind Murugesan¹, Krishna Chandar Nagamuthu Raja²

Affiliations

¹ Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, India.
² Centre for Nanotechnology Research, Vellore Institute of Technology, Vellore-632014, India.

PMID: 34624877
DOI: 10.1088/1361-6528/ac2e24

Abstract

The 1T/2H hybridized and 2H pure phases of MoS₂nanoflowers were synthesized in a one-step hydrothermal process with the molybdenum source as sodium molybdate dihydrate and the sulfur source as thiourea. The as-prepared 1T/2H hybridized and 2H pure phases of MoS₂were investigated using a thermogravimetry\differential thermal analysis, powder x-ray diffraction, field emission scanning electron microscopy, and energy-dispersive x-ray spectroscopy. The obtained 1T/2H hybridized phases of MoS₂were confirmed by the Raman spectroscopy. The electrochemical characteristics of MoS₂electrodes were examined using cycle voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The electrodes are based on the 1T/2H hybridized phases MoS₂with specific capacitance (C_p) of 555.4 F g^-1at current densities (C_d) of 0.5 A g^-1, capacity retention ratio of 85% after 10 000 cycles were observed that could be a strong potential electrode material for supercapacitors application.

Keywords: MoS2; cyclic stability; electrochemical capacitors; hydrothermal; metastable phase; specific capacitance.